Page 46 - Statistics for Environmental Engineers

L1592_frame_C03 Page 37 Tuesday, December 18, 2001 1:41 PM

3.4 Effluent Suspended Solids. The data below are effluent suspended solids data for one year of
a wastewater treatment plant operation. Plot the data and discuss any patterns or character-
istics of the data that might interest plant management or operators.

Day Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec
1 33 32 16 25 21 20 29 26 6 23 18 11
2 37 22 14 26 30 11 36 33 18 13 16 9
3 23 22 12 26 31 22 68 21 13 13 20 12
4 28 38 14 30 28 21 32 21 8 9 15 15
5 41 10 13 27 31 21 24 19 9 9 12 18
6 37 34 23 24 35 27 22 19 22 5 12 17
7 23 32 15 20 26 58 22 15 38 6 12 19
8 24 33 22 25 39 40 31 20 11 10 39 6
9 22 42 17 22 13 25 32 25 10 5 8 10
10 28 19 22 15 21 24 21 11 8 10 16 9
11 27 29 28 12 20 26 24 13 9 10 14 10
12 16 28 11 18 41 24 20 14 10 5 12 12
13 18 31 41 30 25 32 23 26 12 4 13 9
14 24 29 30 23 25 9 24 19 14 16 15 11
15 21 20 34 23 21 13 26 21 15 7 16 14
16 26 21 24 33 20 12 23 16 9 8 14 8
17 21 12 19 38 19 15 22 7 18 11 18 9
18 31 37 35 31 21 20 28 13 20 8 15 4
19 28 25 27 31 18 24 14 10 29 11 12 17
20 13 19 20 32 24 20 28 10 33 5 10 21
21 14 16 60 36 42 9 36 11 14 10 16 28
22 30 23 68 24 28 8 50 11 11 15 18 42
23 41 9 46 20 35 15 24 14 26 47 10 22
24 30 17 27 20 25 20 22 11 34 20 11 16
25 47 20 23 22 11 19 24 16 38 13 3 9
26 33 24 26 25 22 28 26 13 40 28 9 12
27 41 28 26 25 25 29 11 12 41 41 8 9
28 44 13 42 24 23 25 19 20 18 29 9 7
29 30 20 33 27 28 21 10 28 29 29 10
30 15 21 13 33 25 21 13 38 18 11 7
31 32 22 26 24 14 25 12

3.5 Solid Waste Fuel Value. The table gives fuel values (Btu/lb) for typical solid waste from 35
countries. (The United States is number 35). Make a matrix scatterplot of the five waste
characteristics and any other plots that might help to identify a plausible model to relate fuel
value to composition.
MSW Components Fuel Value
Country Paper Metal Glass Food Plastic (Btu/lb)
1 38 11 18 13 0.1 3260
2 35 10 9 24 6 3951
3 2 1 9 40 1 1239
4 20 5.3 8 40 5 3669
5 10 1.7 1.6 54 1.7 2208
6 1 3 6 80 4 2590
7 22 1 2 56 5 3342
8 13.4 6.2 6.6 41.8 4.2 2637
9 32.9 4.1 6.1 44 6.8 4087
10 37 8 8 28 2 3614
11 55 5 6 20 6 4845
12 30 4 4 30 1 2913
13 6 5 9 77 3 2824
14 20 5 10 21 2 2237
© 2002 By CRC Press LLC